Overall, very nice.
I like that you can customize from any starting point by clicking the build your own tab, though this is not obvious.
The inconsistency that I see is that only the Get a Recommendation tab has the "I'm Done" button. In that menu, the "adjust" really does nothing, "add to cart" is the same as buttn on top, and customize activates the "build your own tab"  (the clue I needed to realize you could do this at any time). My recommendation is to keep the tabs consistent with all having this button  since I do think having the "customize" item is very helpful.